Here's another chart, mainly for informational purposes. I noted the Linux version came with 32-bit and 64-bit executables, so was curious just how much it mattered. These are done on Linux, using BuGLe for FPS capturing. So it's probably not directly comparable against FRAPS speeds. In particular, BuGLe doesn't (so far as I could tell) support starting and stopping the capture with a key, so I had to run it the whole time and trim the start and end. Both datasets are from the same system: Core i7 920, stock speeds, triple-channel low-latency memory, hyperthreading off, running Fedora 20 alpha. Interestingly, I got about half the speed when I tried it on Mint Linux. I have no clue why, but it's probably my fault. (Data files) So why did the 64-bit version run much longer, despite being significantly higher FPS? Probably because I did that one first, and I was better at the staging the next time. I did do a few practice runs first, but it is fairly hard to see what's going on with a face full of rocket exhaust, and I don't have all day to get it perfect.